It can't be that in that flashback there's the Pirate King, WB, Garp and even Shiki and we're not going to have several chapters where we see the feats of those characters...
The hype surrounding the God Valley incident started with this.
And it can't be that Oda just keeps giving us shitty dialogue and not giving us a feast of fights.

Kaido is undoubtedly a special case in this sleep aid manga.